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AR-15 Rifles, Parts, Uppers & Kits

Shop AR-15 5.56 & .223 rifles, parts, uppers, & more at Palmetto State Armory. Find high-quality AR-15s, trusted brands, and expertly crafted components. Customize or build from scratch with our vast inventory of barrels, stocks, and triggers. Palmetto State Armory is your destination for the best AR-15 essentials at competitive prices.

Shop AR-15 rifles, parts, uppers, & more at Palmetto State Armory. Find high-quality guns such as AR-15 .223 rifles and AR pistols from trusted brands, and expertly crafted components. Customize or build from scratch with our vast inventory of barrels, stocks, and triggers. Palmetto State Armory is your destination for the best AR-15 essentials at competitive prices.

Shop the complete AR-15 platform at Palmetto State Armory, your destination for rifles, uppers, lowers, parts, and build kits. Whether you’re buying a factory-built rifle or assembling a custom AR-15 from the ground up, you’ll find trusted brands, proven components, and configurations for every purpose. Explore options in popular calibers like 5.56 NATO, .300 Blackout, and more. Build it your way or buy it ready to run—all at everyday low prices.

Rifles

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Uppers

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Lower Receivers

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AR-15 Parts

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Triggers

Triggers
.338 ARC

.338 ARC
Magazines

Magazines
Pistols

Pistols
Kits

Kits
Suppressors

Suppressors
Left Handed AR-15

Left Handed AR-15
Featured Products
  1. R&D Precision AR45 Bolt Carrier Group
    R&D Precision AR45 Bolt Carrier Group
    Rating:
    87%
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    Regular Price $149.99 Special Price $29.99
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  2. PSA AR-15 16" Mid-Length 5.56 NATO 1/7 Nitride 13.5" Lightweight M-Lok MOE EPT Rifle w/MBUS Sight Set
    PSA AR-15 16" Mid-Length 5.56 NATO 1/7 Nitride 13.5" Lightweight M-Lok MOE EPT Rifle w/MBUS Sight Set
    Rating:
    98%
    (556)
    Regular Price $599.99 Special Price $579.99
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  3. LWRC IC .223 Remington AR Lower, Black - ICL5B
    LWRC IC .223 Remington AR Lower, Black - ICL5B
    Rating:
    93%
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    Regular Price $866.99 Special Price $649.99
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  1. Brownells Buttstock Screw, Black

    Brownells Buttstock Screw, Black

    Regular Price $10.99 Special Price $9.99
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  2. Brownells Rifle Receiver Extension Tube, Black

    Brownells Rifle Receiver Extension Tube, Black

    Regular Price $63.99 Special Price $57.99
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  3. Brownells Pistol Grip, Brown

    Brownells Pistol Grip, Brown

    Regular Price $16.99 Special Price $14.99
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  4. Brownells Pistol Grip, Green

    Brownells Pistol Grip, Green

    Regular Price $16.99 Special Price $14.99
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  5. Brownells Pistol Grip, Black

    Brownells Pistol Grip, Black

    Regular Price $17.99 Special Price $15.99
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  6. Brownells Rifle-Length Handguard Set 12", Brown

    Brownells Rifle-Length Handguard Set 12", Brown

    Regular Price $49.99 Special Price $44.99
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  7. Brownells Rifle-Length Handguard Set 12", Green

    Brownells Rifle-Length Handguard Set 12", Green

    Regular Price $46.99 Special Price $41.99
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  8. Brownells Rifle-Length Handguard Set 12", Black

    Brownells Rifle-Length Handguard Set 12", Black

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    Regular Price $48.99 Special Price $43.59
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  9. Brownells Carbine Buffer, Silver

    Brownells Carbine Buffer, Silver

    Regular Price $164.99 Special Price $149.99
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  10. Brownells H2 Carbine Buffer, Gray

    Brownells H2 Carbine Buffer, Gray

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    Regular Price $113.99 Special Price $102.99
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  11. Brownells H1 Carbine Buffer, Gray

    Brownells H1 Carbine Buffer, Gray

    Regular Price $41.99 Special Price $37.69
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  12. Brownells Carbine Buffer, Silver

    Brownells Carbine Buffer, Silver

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    Regular Price $17.99 Special Price $15.99
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  13. Brownells Flash Hider and Grenade Ring 1/2-28, Black

    Brownells Flash Hider and Grenade Ring 1/2-28, Black

    Regular Price $54.99 Special Price $49.99
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  14. Brownells M16 Bolt Carrier Group .223 Remington/5.56x45mm/.300 AAC Blackout, Black

    Brownells M16 Bolt Carrier Group .223 Remington/5.56x45mm/.300 AAC Blackout, Black

    Regular Price $157.99 Special Price $142.99
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  15. Brownells 3-Pack M4 Buffer Spring

    Brownells 3-Pack M4 Buffer Spring

    Regular Price $14.99 Special Price $13.19
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  16. Brownells 3-Pack Extractor Spring

    Brownells 3-Pack Extractor Spring

    Regular Price $9.99 Special Price $8.49
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  17. Brownells 3-Pack Ejector Spring

    Brownells 3-Pack Ejector Spring

    Regular Price $12.99 Special Price $11.29
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  18. Brownells 3-Pack Detent Takedown Spring

    Brownells 3-Pack Detent Takedown Spring

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    Regular Price $10.99 Special Price $9.39
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  19. Brownells 3-Pack Bolt/Gas Ring, Silver

    Brownells 3-Pack Bolt/Gas Ring, Silver

    Regular Price $8.99 Special Price $7.49
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  20. Brownells 3-Pack Disconnector Spring, Silver

    Brownells 3-Pack Disconnector Spring, Silver

    Regular Price $7.99 Special Price $6.59
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  21. Brownells 3-Pack A2 Charging Handle Latch Spring, Silver

    Brownells 3-Pack A2 Charging Handle Latch Spring, Silver

    Regular Price $7.99 Special Price $6.59
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  22. Brownells 3-Pack Ejection Port Cover Spring, Silver

    Brownells 3-Pack Ejection Port Cover Spring, Silver

    Regular Price $7.99 Special Price $6.59
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  23. Brownells 3-Pack Extractor Spring

    Brownells 3-Pack Extractor Spring

    Regular Price $10.99 Special Price $9.39
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  24. Brownells 3-Pack Buffer Retainer Spring

    Brownells 3-Pack Buffer Retainer Spring

    Regular Price $6.99 Special Price $5.69
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  1. Rifles 2104
  2. Pistols 932
  3. Uppers 1435
  4. Kits 747
  5. Lower Receivers 858
  6. Parts 9328
  7. Suppressors 175
  8. Left Handed AR-15 7
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Looking for something more specific?

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AR-15 Buyer's Guide: Build or Buy?

At Palmetto State Armory, we believe in the right to keep and bear arms—and the right to build them. One of the first choices you'll face is whether to buy a complete rifle or build one from parts.

Option 1: Buying Complete

Best for: First-time owners and those who want a "grab-and-go" solution.

Buying a Complete AR-15 ensures that all components (upper, lower, buffer system) are factory-tested to work together perfectly. It comes ready to shoot right out of the box (just add an optic!).

Option 2: Building (The PSA Way)

Best for: Customizers and those looking to save money.

By purchasing a Rifle Kit and a Stripped Lower Receiver separately, you can save 11% Federal Excise Tax (FET) and learn exactly how your rifle works. Plus, you get to choose every part, from the trigger to the barrel length.

Understanding Gas Systems: Carbine vs. Mid-Length

The gas system length determines how the rifle cycles. Choosing the right one affects recoil and reliability.

  • Carbine Length (7"): The military standard (M4). It is punchy and reliable but has a sharper recoil impulse. Standard on most 14.5" and 16" barrels.
  • Mid-Length (9"): Rapidly becoming the civilian favorite for 16" barrels. It provides a smoother recoil impulse and less wear on parts because the gas pressure drops slightly before cycling the bolt.
  • Rifle Length (12"): Used on 18" and 20" barrels (like the M16). It offers the smoothest shooting experience possible.

Common Questions About AR-15s

What is the difference between 5.56 NATO and .223 Remington?

While they look identical, 5.56 NATO is loaded to a higher pressure than .223 Remington.
The Rule: You CAN shoot .223 ammo in a 5.56 barrel safely. You generally SHOULD NOT shoot 5.56 ammo in a barrel marked strictly ".223 Remington" (unless it is a .223 Wylde). PSA's 5.56 barrels and Complete Uppers can safely shoot both.

What is a "Mil-Spec" AR-15?

"Mil-Spec" stands for Military Specification. It refers to the materials and dimensions used by the US Military (e.g., 7075-T6 Aluminum for receivers, Carpenter 158 Steel for bolts). A Mil-Spec rifle ensures that you can swap parts with almost any other standard AR-15 on the market.

Can I hunt with an AR-15?

Absolutely. The AR-15 is a "Modern Sporting Rifle." While 5.56 is excellent for varmint hunting (coyotes, hogs), many hunters prefer larger calibers. We offer AR-15s in 6.5 Grendel (great for deer) and .300 Blackout (great for hogs and suppressed hunting).

Is the AR-15 a "Common Use" rifle?

Yes. With over 20 million in circulation, the AR-15 is the most popular rifle in America. Its modularity allows it to be used for home defense, competition, hunting, and recreational target shooting.